y21t
z21ti
021tib
121t
221ti
nt2ti
ot2tib
pt2t
qt2ti
rt2tib
ck3tib
dk3t
ek3ti
fk3tib
gk3t
1a4t
2a4ti
3a4tib
4a4t
5a4ti
q14ti
r14tib
s14t
t14ti
u14tib